Valve mechanism for steam-heated rotary cylinders.



M. HJ'COLLoM.

VALVE MECHANISM FOR STEAM HEATED ROTARY C-YLINDERS.

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M. H. coVLLoM. lVALVE MECHANISMFOR STEAM HEATED ROTARY CYLINDERSMAPPLICATION FILED MAR. 3l. 1916. 1,227,040'. Y 4Patented May 22,1917.

2 SHEETS-SHEET 2.

uNiTED g sTATEs rATENT orrion MARTIN- H. GOVLLOM, OF DENVER, COLQZRADO.

:"vaLvE-MEQLIAMSM FOR eraan-Haaren ROTARY CYLINDERS..

I as will enable others skilled-in. theL art-i to'.

which itl appertains to fmake' and use the same, reference being had tothe accompanyfk ing drawings, and to thecharacters of reference markedthereon, which form a part' of this.1 specilication.

My invention relates'to'improvements inl valve .controlling mechanism,my special object being to prevent the sudden opening of a valve`whereby fluid-'as steam is allowed to enter a; cold receptacle as thedrum of a mangle, since the sudden entrance off'steam in,y a relativelylarge volume into such a receptacle. is attended `with ldisastrousresults, since the sudden heating of the. drum cracks or ruptures thesaine, dueto; too unequal expansion. lhile this is the particular objectwhich I have in mindandthe special use of my improvement which will beupf. permost in mind in describing'thev structure, it must be understoodthat the invention isnot limited to. this particular use, but may beadvantageously employed in other rela*- tions where a similar or likefunction is required. n

Myinvention. is well adapted for use. with a globe valve of ordinaryconstructionand with other valves which operate on a similar principle,that is to say, which` are normally manually operated by means of ascrew stem whereby as the stem is rotated through the medium of anexposed hand wheel, the valve is advanced toward vits. seat o1'retlacted, according to the vdirectionof-the rotation ofthe stem. a

My improvement consists in applying. toy the stem of. a valve of thischaracter features which arefadapted to coperate with other mechanism'also forming a part of my iin-Y provement, in such a manneras to.positivelyV lockv the valve against manual operation for initial openingpurposes, thus absolutely preventing the sudden introduction of fluidvas steam into the. drum of the mangle forv instance, it being assumedthat the valve 1s f so arranged as to regulate'the control of thnpassage of" steam from the boiler to` the said Speccaton of LettersBatent.

Patented May 2.2, 19517.

Application 'led March 31, 1916; Serial No. 88,018.

drum.l Furthermore, my improvement is of such character that the valvemaybe inanually operated for closing purposes in substantially the samemanner as if my improve# ment .were not employed.

Having briefly outlined theinvention, as well asthe function it isintended toV accompli'sh, I will proceed tol describe the same. indetail, 1 reference' being madev to. the. accompa-y nying drawing, inwhichisillustrated an embodiment thereof. In ythis drawing;-

Figure 1 is. a view partly in elevation and partly in sectionillustrating myl improved valve controlling mechanism, the same beingshown applied to a valve arranged to.. regu.-

ceptacle, the 'latter bein-g largely broken y away. f

Fig. 2 .isa similar view, the parts., however, being shown in different;relative pbsitions. v Y

f Fig. 3. is a section'taken on the line 3-3, Fig. 1, looking towardythe ri. 2;l;it.y VThe same reference charac-ters indicate the same partsin all the views.

i Let the numeral 5 `designatethe stem. and 6 the valve piece of anordinary globe.y valve, the valve piece being adapted to .engage a seat7 for regulating the passage of steam from a supply pipeYSfthrough acasing 9. which is provided with a port tol allenT the steam when thevalve is' unseated to. pass through the casing 9 tofa conduit' member10, and thence through a member 12 into the chamber 13 of a druinilflwhich it'wihll formed between the trunnion and the con-V duit 12. T hehollow trunnionl is. eqn1 with a crank arm 19 provided with a 'L adaptedto 'engage thet teeth 21 of a star wheel 22 splined on a spindle 23which isv` journaled in a. stationary part 2,4 ofV the structure inwhich the valve is mounted. The spindle 23 is equipped with a. fast pinion 25 which meshes .with a gear wheel 26 whose hub 27 constitutes ranut interiorly threaded as shown at 28 to coperate with the threadedpart 29 of the valvey stem 5. This hub orV nut 27 is journaled iny astation-k ary bearing 30. to. preventlongitudinaltravelof the nut on thescrew stem of the valve, the gear 26 being provided with a. shoulder 31which engages the bearing 30 on one side, while a stop nut 32 threadedon the member 27 engages an opposite shoulder 33 of the bearing.

The star wheel 22 is adjustable on the spindle 23 and longitudinallythereof, whereby its teeth 21 may be thrown into or out of the path oftravel of the pin 2O of the crank arm 19 as the mangle drum is rotated.Provision is made, as hereinafter described, for locking the valve stem5 against operation for valve opening purposes, except through themedium of the star wheel when actuated by the crank arm 19 as the drumis rotated, the opening movement of the valve stem in this case beingslowly accomplished through the medium of the pinion 25 and the gear 26,the hub or nut 27 in this case being rotated to ,impart the longitudinaltravel to the valve stem in the valve opening direction, this movement,however, being so slow that the steam is introduced very gradually intothe drum, thus preventing any injurious consequences of the characterheretofore indicated.

Upon the valve stem 5 is mounted a fast wheel 34 which is provided onone face with teeth 35 and on its periphery with recesses 36. The teeth35 are adapted to be engaged by a pawl 37 fulcrumed on the frame of thestructure as shown at 38, its short arm 39 beyond the fulcrum beingslotted as shown at 40 to engage a pivot pin 41 mounted on a member 42which is slotted as shown at 43 to receive the slotted end of the pawl.The member 42 is connected with one end of a. stem 44 which has athreaded portion 45 which enters a threaded opening in the said member.This stem 44 is connected at its opposite extremity with a piston orplunger 46 located Ain a chamber 47 formed in the framework of thestructure, one extremity of the said chamber being closed by a screwplug 48 while its opposite extremity is closed by a iiexible diaphragm49 against which the plunger 46 is held by means of a spiral spring 50which surrounds the stem 44, one extremity bearing against the plungerwhile its opposite extremity engages the screw plug. The stem 44 passesthrough a perforation 51 formed in the said plug and in which the stemfits closely. The diaphragm 49 is held between the circumferentialshoulder 52 at the base of the chamber 47 and a flange 53 of acoperating member 54 having a chamber 55 arranged on the opposite slideof the diaphragm from the plunger 46. This member 54 is provided with anipple 56 with which a pipe 57 is connected by means of a couplingsleeve 58.

kThis pipe 57 is in communication at one extremity with the conduit 10through which the steam passes on its way to the drum 13 as heretoforeexplained. The pipe 57 communicates by way of an opening 95 in thenipple 56 with the chamber The diaphragm 49 is made of such materialthat when its outer portion is clamped between the parts 52 and 53, itscentral portion will expand in response to the pressure of the steam inthe pipe 10 which is the same as in the drum 13, whereby the plunger 46will be actuated (see Fig. 2) to move the stem 44 against the tension ofits spring 50, to throw the pawl 37 into the inactive position (see Fig. 2) or so that it cannot the teeth 35 of the wheel 34. The functionof this construction is to maintain the free extremity of the pawl 37 inengagement with the toothed face of the wheel 34 through the medium ofthe spring 50 acting on the stem 44 through the plunger 46, when thereis no steam in the drum 13, or at least not enough to produce sutlicientpressure to expand or ex the diaphragm 49 as shown in Fig. 2. ln otherwords, when the drum 13 is cold and the valve piece 6 is in the closedposition, the pawl 37 engages the teeth 35 of the wheel 34, to lock thestem 35 against rotation in a direction to open the valve, and this pawltogether with its controlling mechanism, is concealed by means of ahousing plate 59 which is secured to the stationary framework of thevalve mechanism, by means of fastening screws 60 or in any othersuitable manner.

Provision is also made for locking the wheel 34 against movement in thedirection to open the valve stem, through the medium of a stop plate 61which is secured as shown at 62 to the inner extremity of a stem 63which is acted on by a spiral spring 64 one extremity of which engages ashoulder 65 formed on the stem, while its opposite extremity engages ashoulder 66 formed in the stationary framework of the structure. Thisspring is inclosed by a stationary casing 96 formed integral with a part67 of the framework. This part 67 is also provided with a guide lug 68which is perforated to allow the stem 63 to pass therethrough. Theconstruction is such that the spring 64 normally acts to force the stopplate 61 into one of the recesses 36 of the wheel 34. This stop plateextends in a direction parallel with the valve stem 5, so that as thevalve stem moves longitudinally in a direction to open the valve, thewheel stop plate, when the valve is completely open. It will also beunderstood that during the opening movement of the valve, the wheel 34will disengage itself from the pawl 37 shortly after the openingmovement of the valve commences. As soon as the valve 34 is releasedfrom the locking action of the pawl 37 and the stop plate 61, wherebythe stem 5 is free to rotate, the rotation of the wheel 26 and its nut37, will no longer engage 34 will disengage itself from the ist serve tomove the valve stem 5 in the valve opening direction, since thestem andthe nut will rotate in unison without any longitudinal travel of thevalve stem. l

After the valve has been opened to. its limit of movement, the stem 5Vmust be free to rotate for the closing movement ofthe valve withoutinterference by the stop plate 61. Hence, provision is made fordisengaging this stop plate from the wheel 34,. and this is.accomplished as the star wheel 22 is shifted on the spindle 23 towardthe left or to the position shown in Fig. 2, whereby the teeth of thestar wheel will be. removed from the'path of the pin 20 of the crank arm19. The hub` of theL star wheel is provided with a recess 69 having abeveled wall which as the stary wheel is shifted toward thev left (seeFigs. 1 and2), engages a pin 70 on the stem 63, and imparts suiiicientlongitudinal travel to the said stem to disengage the stop plate fromits recess in the wheel 34;, whereby the said stop plate lies beyondthepath of the periphery of the saidwheel.

This shifting movement of the star wheel, is accomplished through .themedium of a lever 71 which is fulcrumed at one extremity on theframework as shown at 72 and provided intermediate `its extremitieswith. a lug 731 which enters a vcircumferential groove 74 formed' in thehub of the star wheel. The handlev 7 5 of this lever is exposedwherebyit is accessible to theperson in charge of the apparatus, so thatby shifting the lever in the one direction orV the other, the star wheelmay be thrown into or out of the path rof the pin 20 as may be desired.The housing 59 is slotted as shown at 76 to allow the. necessarymovement of the lever 71,-to vperform the aforesaid function. f

A segment 77 of the cogged rim of the gear 26, is severed from the gearand secured as shown at 7S to one extremity of a leaf spring 79 which issecuredy at its opposite extremity as shown at 80 to the rim of thegear, the said spring having ain opening 81 through which the valve stem5 freely passes. A washer 82 normally engages a shoulder 83 formed onthe nut or hub 27 of the gear 26. This washer is also in engagement withthe spring 79 which isarranged onthe opposite side fromthe shoulder 83.As soonas the stem 5 of the valve has moved outwardly or toward theright (see Figs. 1 and 2), asuflicient distance to open the valve, thethreaded portion of the stemA which constitutes shoulder, acts on thewasher 82 to force the spring 7 9" outwardly to the position shown inFig. 2, whereby the segment 77 of the'cog'ged periphery of the gear 26,will be disengaged from the wheel, forming a space of sufficientmagnitude toy prevent the operation of the gear Athro-ughk the medium'of the pinion`25, as soon as thegear has been turned sufficiently tocause the pinion to enter the recess or space 8.4i-

formed by the removal of the segment 77. In this way provision is madefor automatically stopping the rotation of the gear 26 through themedium of the star wheel 22, after the function of the latter has beencompleted. It will also be understood that in the event that the segment7 7 of the gear 26 when removed from its recess 84C, is some distancefrom the pinion 25, the wheel 26 may continue to turn until the pinionreaches the recess Se without injury to the mechanism, since as soon asthe segment 77 is removed from its position in the wheel, the toothedwheel 34 is also disengaged from the stop plate 61, whereby the furtherrotation of the wheel 26 and its hub-nut 27, will result inthe rotationof the stem 5 with the nut, and', consequently, there will be nolongitudinal travel of the stem 5. From this it will be understood thatthe operation of the mechanism isy automatic to the extent of preventingany injury to the mechanism by virtue ofthe fact that the openingmovement of the valve 4is accomplished through the medium of the rotaryaction of the drum 13.

From the foregoing description the use `and operation of my improvedvalve or valve-controlling mechanism will be readily understood.Assuming that the valve is in the closed position, if it is desired tointroduce steam into the mangle-drum for operating purposes, the rotaryaction of the drum is imparted through the medium of any suitabledriving mechanism not shown). At the same time the star wheel 22 isshifted from the position shown in Fig. 2 to the position shown in Fig.1, whereby its` teeth 21 lie in the path of travel ofthe pin 20 of thecrank Varm 19 carried by theV trunnion 15 of the drum 13. rl`hisreleases the stop plate 61 which immediately engages a recess 36 of thewheel At the Asame time the pawl 37 is inv locking engagement with the`toothed face of the said `wheel to prevent rotary movement of the stem 5in a direction to open the valve. Then, as the drum rotates, during eachcomplete revolution, the pin 20 will act on a tooth of the star wheel 22to impart a partial rotary movement to the spindle and the pinion 25. Itwill thus 'be seen that as the pinion 25 is relatively small as comparedwith the coggedvr periphery of the gear 26, aV large number ofrevolutions of the drum 13 will be required in order to open the valve,and that, consequently, the opening movement of the valve is very slowlyaccomplished so that the steam is admitted into the drum 13 so graduallythat all injury to the drum by the nut 7, will cease automatically byvirtue of the mechanism whose operation has been heretofore set forth.

Attention is called to the fact that the pinion 25 is subjected to theaction of a spring-actuated friction washer 85 which is mounted on thespindle 23 and engages the inner face of the said pinion, the saidwasher being actuated by a leaf spring 86 which is secured to thestationary framework as shown at 87. The outer portion of this spring isbifurcated as shown at 88 to straddle the spindle 23 whereby it actsupon the washer S5 to produce sufficient friction between the washer andthe pinion, to prevent the latter and its connections from moving inresponse to the momentum imparted through the medium of the star wheel,by the pin 20. Were it not for this friction device, each stroke of thepin 20 might result in moving the pinion 85 farther than is desirable inorder to properly limit the opening movement of the valve as heretoforeeX- plained.

The movement of the stem 44 which is connected with the pawl 37 asheretofore described, is limited in both directions by a set screw 8Owhich enters a groove 81 formed in the plunger 46.

Attention is called to the fact that the term drum or cylinder whereverused in the specification and claims must be considered broad enough toinclude a hollow rotary receptacle of any kind with which it may bepracticable to employ my improved construction. Furthermore, the termsteam wherever used in the specification and claims must be consideredcomprehensive enough to cover fluid of any character.

In further explanation of the means for frictionally retarding therotation of the pinion 25 and its cooperating gear, it should beexplained that the spindle 23 is locked against longitudinal travel inits bearing in the part 24, by a collar 94 which is keyed to the spindleand is in contact with the frame part 24 on the opposite side thereoffrom the washer 85 and its engaging spring 86. This collar 94 may have arelatively large frictional surface area and acting in coperation withthe spring 86 and the washer 85, will produce the necessary retardingaction, whereby it will be difhcult to manually rotate the star wheel.It will be evident that it is desirable to make the manual rotation ofthe star wheel difficult, in order to prevent possible tampering withthe mechanism or the possible opening of the valve by the rotation ofthe nut 27 more rapidly than is desirable. It will be understood that itwill be practicable to rotate the star wheel through the instrumentalityof the drum as heretofore described, notwithstanding the retardingaction of the frictional construction heretofore explained since thepower of the rotating drum is so great comparatively speaking that theamount required to operate the star wheel in opposition to the aforesaidretarding influence, is inappreciable. y

Having thus described my invention, what I claim is;-

1. In valve mechanism for controlling the passage of fluid to rotaryreceptacles, the combination of a valve piece having a rotary stemprovided with a threaded portion, a nut having threads coperating withthe threads of the said stem, the nut being journaled to prevent travellongitudinally on the stem, means for locking the stem against rotationin one direction, and an operative connection between the rotaryreceptacle and the nut for rotating the latter in the oppositedirection.

2. The combination with a hollow rotary member, of a valve provided witha rotary stem having a threaded portion, a nut threaded to receive thethreaded portion of the stem and journaled to prevent travellongitudinally on the stem, means to prevent rotation of the stem in onedirection, and an operative connection between the rotary member and thenut to rotate the latter in the opposite direction to move the valve andits stem in the direction of the latters axis.

3. The combination with a rotary drum, of a valve for controlling thesupply of Huid thereto, said valve having a rotary stem, means forlocking the stem against rotary movement in a direction to open thevalve, a nut in which the valve stem is threaded, the nut beingjournaled to prevent travel in the direction of the axis of the stem,and an operative connection between the nut and the drum, whereby as thelatter is rotated the nut will be actuated to move the valve and itsstem in the valve-opening direction.

4. The combination with a hollow rotary drum, of a valve for controllingthe supply of steam thereto, the valve having a stem mounted to rotate,and provided with a threaded portion, a nut which the threaded portionof the stem engages, the nut being journaled to prevent travel in thedirection of the axis of the stem, means for preventing the stem whenthe valve is closed from rotating in a direction to turn on the steam,and an operative connection between the nut and the drum to impart astep-by-step rotary movement to the nut as the drum rotates. n

5. The combination with a hollow rotary drum, of a valve for controllingthe supply of steam thereto, the valve having a stem mounted to rotate,and provided with a threaded portion, a nut which the threaded portionof the stem engages, the nut being journaled to prevent travel in thedirection of the axis of the stem, means for prevent# ing the stem whenthe valve is closed from rotating in a ydirection to turn on the steam,an operative rconnection between the nut and the drum to impart astep-liby-step vrotary movement to the nut as the drum rotates, -andmea-ns for automatically releasing the Ameans for locking'the valve stemagainst rotation. Y v Y 6. The combination with a hollow rotary drum,fofa valve for controlling the. supply of steam "thereto, the valve havinga stem mounted to rotate, and provided with a threaded portion, a nutwhich the threadedl portion of the stem engages, the nut being journaledto prevent 'travel in the direction ci the axis ofthe stem, means forpreventing the stem when the valve is closed from rotating in #adirection to turn on the steam,

an operative connection between the nut and' the drum Ato impart Vastep-by-step rotary movement to the n-ut as the drum rotates, and means`-for `manually breaking the operative connect-ion between 'the drum andthe nut.

f7. The combination with a hollow rotary drum, of a vaflve forcontrolling the supply of steam thereto,- the valve rhaving a stemmounted to rotate, and provided with a threaded portion, a nut which thethreaded portion of the stem engages, the nut being journaled to preventtravel in the direction of vthe axis of the stem, means for preventingthe `stem when the valve is closed from rotating in a direction'to turnon the steam, an operative connection between the nut and the' drum toimpart a step-by-step rotary movement to the nutk as the drum rotates,means for manually breaking the operative connection between the drumand the nut, `and means for automatically breaking such connection Whilethe manually adjustable means maintains its operative relation with thedrum.

8. The combination withA a hollowL rotary drum, of a valve forcontrolling the supply of steam thereto, they valve having astem:mounted to rotate, and provided with a threaded portion, a nut which thethreaded portionofthe stem engages, the nut being j'ournaled to preventtravel in the direction of the axis or" the stem,`means for preventingthek stem when the valve is closed from rotating ina direction to turnon the steam, an operative connectionbetween the nut :and drum to imparta step-by-step rotary movement to the nut kas the drum-rotates, andmeans for automatically breaking such connection'as the valve stemreaches the limit of its valve-opening movement.

The combination with a hollow rotary drum, of a valve for regulating thesupply of steam or other fluid thereto, the valve being provided with astem having a threaded portion, a nut which 'the threaded vportion ofthe stem engages in coperative relation, the nut kbeing journaled toprevent travel longitudinally on the stem, a toothed wheel fast on thestem, a pawl mounted to engage the teeth of said wheel and lock the stemagainst rotation in the direction to open the valve when the latter isclosed, and an operative Yi-as't on Ithe stem, a pawl mounted to engagethe teeth of said wheel and lock the stem vagainst rotation in thedirection to open the valve when the latter is closed, an operativevconnection between the drum and nut to rotate the latter in a directionto open lthe valve when the stem is so locked, said 'connectioncomprising a gear fast on the nut, a `pinion meshing with said gear, astar wheel mounted to rotate with the pinion, and a part mounted torotate with the drinn land arranged to engage a tooth of the star vwheelyevery time the drum kmakes a revolution. Y i

ll. The combination with a hollow rotary drum, of a valve for regulatingthe supply of steam or other fluid thereto, the valve being providedwith a stem having a threaded portion, a nut which the threaded portionof the stem engages in coperative relation, the nut being journaled toprevent travel longitudinally on the stem, a toothed wheel fast lon thestem, a pawl mounted to engage the teeth of 'said wheel and lock thes'tem against rotation in the direction to op'en the valve when thelatter is closed, an operative connection between the Adrum and nut torotate the latter in a direction to open the valve when thestem is solocked said 'connection comprising a gear fast on the nut, a .pinionmeshing with said gear, a star wheel mou'nted `to rotate with thepinion, and a partr mounted to rotate with the drum and `arranged toengage a tooth of the star wheel every time the drum makes a revolution,the star wheel being adjustable to throw it'into and out of operativerelation with the said part carried by the drum, as occasion mayrequire.

1Q. The combination with va hollow rotary drum, o1E a valve forregulating the supply of steam or other fluid thereto, the valve beingprovided with a Vstem having a threaded portion, a nut which thethreaded portion of the stem engages in cooperative relation, the nutbeing journaled to prevent travel longitudinally on the stem, means forlocking the stemagainst movement, a gear wheel fast ou the nut, a pinionmeshing with said gear, a spindle on which the pinion is mounted andwith which it is connected to rotate, a star wheel mounted to rotatewith the spindle, and a projection mounted to rotate with the drum andarranged to engage a tooth of the star wheel and impart a partialrotation thereto every time the drum makes a revolution.

13. The combination with a hollow rotary drum, of a valve for regulatingthe supply of steam or other fluid thereto, the valve being providedwith a stem having a threaded portion, a nut which the threaded portionof the stem engages in coperative relation, the nut being journaled toprevent travel longitudinally on the stem, means for locking the stemagainst movement, a geary wheel fast on the nut, a pinion meshing withsaid gear, a spindle on which the pinion is mounted and with which it isconnected to rotate, a star wheel mounted to rotate with the spindle, aprojection mounted to rotate with the drum and arranged to engage atooth of the star wheel and impart a partial rotation thereto every timethe drum makes a revolution, the cogged rim ot' the said gear having aremovable segment normally spring-held in operative relation with thepinion, and means for automatically remov ing said segment as the valvestem approaches its valve-opening limit of movement.

14. The combination with a hollow rotary drum, of a valve for regulatingthe supply of steam or other fluid thereto, the valve being providedwith a stem having a threaded portion, a nut which the threaded portionof the stem engages in coperative relation, the nut being ournaled toprevent travel longitudinally on the stem, means for locking the stemagainst movement, a lgear wheel fast on the nut, a pinion meshing withsaid gear, a spindle on which the pinion is mounted and with which it isconnected to rotate, a star Wheel mounted to rotate with the spindle, aprojection mounted to rotate with the drum and arranged to engage atooth of the star wheel and impart a partial rotation thereto every timethe drum makes a revolution, the cogged rim of the said gear having aremovable segment, a leaf spring secured to the gear at one extremityand connected with the said segment at the opposite extremity, the saidspring having an opening through which the valve stem passes, and meanscarried by the stem and acting on said spring for removing the segmentfrom the rim of the gear as the valve stem reaches the limit of itsopening movement.

15. The combination with a hollow rotary drum, of a valve for regulatingthe supply of steam or other fluid thereto, the valve being providedwitha stem having a threaded portion, a nut which the threaded portion ofthe stem engages in coperative relation,

the nut being journaled to prevent travel longitudinally on the stem, agear fast on the nut, a pinion meshing with the gear, a spindle withwhich the pinion is connected to rotate, a star wheel also connected torotate with the spindle, a part mounted to rotate with the drum andarranged to momentarily engage a tooth of the star wheel during eachrotation of the drum for imparting a step-by-step movement to the pinionand its cooperating parts, and means for frictionally retarding themovement of the pinion.

16. The combination with a hollow rotary drum, of a valve for regulatingthe supply of steam or other fluid thereto, the valve being providedwith a stem having a threaded poi-tion, a nut which the threaded portionof the stem engages in coperative relation, the nut being journaled toprevent travel longitudinally on the stem, a gear fast on the nut, apinion meshing with the gear, a spindle with which the pinion isconnected to rotate, a star wheel also connected to rotate with thespindle, a part mounted to rotate with the drum and arranged tomomentarily engage a tooth of the star wheel during each rotation of thedrum for imparting` a step-by-step movement to the pinion and itscoperating parts, means for frictionally retarding `the movement of thepinion, said last named means comprising a loose washer mounted on thespindle adjacent the pinion, and a spring acting on said washer to forceit against the pinion.

17. The combination with a hollow rotary drum, of a valve for regulatingthe supply of steam or other iiuid thereto, the valve being providedwith a stem having a threaded portion, a nut which the threaded portionof the stem engages in coperative relation, the nut being journaled toprevent travel longitudinally on the stein, a toothed wheel fast on thestem, a pawl mounted to engage the. teeth of said wheel and lock thestem against rotation in the direction to open the valve when the latteris closed, the pawl being fulcrumed intermediate its extremities, a stemhaving one end connected with the arm of the pawl on the opposite sideof the fulcrum from the extremity which engages the toothed wheel, and aspring acting on said stem to hold the pawl yieldingly in engagementwith the teeth ot the said wheel.

18. rllhe combination with a hollow rotarv drum, of a valve forregulating the supply of steam or other fluid thereto, the valve bel ingprovided with a stem having a threaded portion, a nut which the threadedportion of the stem engages in coperative relation, the nut beingjournaled to prevent travel longitudinally on the stem, a toothed wheelfast on the stem, and a spring actuated pawl mounted to engage the teethof said wheel to lock the stem against rotation in the direction tolopen the valve, and a flexible dia.- I phragm operably connected Withthe pavvl on one side and With the steam pressure in the drum on theopposite side `to automatically disconnect the lpawl from the toothed,tace .of the Wheel when the drum is under normal steam pressure.

19. The combination with a hollow yrotary drum, of a'valve 'forregulating fthe supply of steam or other fluid thereto, the valve beingprovided with a stem having a threaded portion, ak nut which ltheythreaded portion of the stem engages in coperative relation, the nutbein-g journaled to prevent travel longitudinally on the stem, a Wheela'st on the stem and having a series of recesses in its peripheral face,a spring actuated stop arranged to engage said recesses to loclrthe stemagainst rotary travel, an operative connection between the drum and thenut to rotate the latter in a direction to open the valve when the stemis so locked, and manually operable meansfor disconnecting the said stopfrom the said vvheel. 20. The combination with -a drum, of a valve forcontrolling the passage of steam to the drum, the valve being providedwith a stem mounted to rotate, a Wheel fast on the stem and having aseries of recesses formed in its peripheral face, a spring actuated stoparranged to enter said recesses to lock the stem against rotation, thesaid stop having a stem provided with a projection, the valve stemhaving a `threaded portion, a nut engaging the threaded portion Aof thevalve stem and journaled to prevent travel longitudinallyon the stem, agear fast on said nut, a pinion meshing With said gear, a spindle withwhich said pinion is connect-ed t-orotate, a star Wheel splined on thespindle, a projection mounted to rotate with the drum and adapted tomomentarily engage a tooth yof the `star Wheel during each revolution ofthe drum, the hub of the star wheel having vone face provi-ded with acavity having an inclined Wall, and means for shifting the star WheeloutV of the path of the lprojection on the drum and to -cause the saidinclined Wall to engage the projection on the stem of the springactuated stop, to disengage the latter from the Whee on the valve stem.

21. The combination with a rotary drum, of a valve for control-ling thesupply of steam-to said drum, the said valve having a stem mounted torotate Vand provided with a threaded portion, a nut engaging thethreaded portion of the valve stem and journaled to prevent travellongitudinally "on the stem, an operative connection Lbetween the ynutand drum for imparting a step-by-step movement to the nut in synchronismwith the rotations of the drum, a Wheel fast on the valve stem andhaving a toothed side face and a recessed peripheral face, aspringactuated paW'l engaging the toothed face to lock the valve stemagainst travel in one direction When the valve is closed and for alimited period after the valve vstem begins its travel in the directionto open the valve,

and a spring actuated stop engaging the recesses in the said Wheel forlocking the stem against rotation after the Wheel has been disconnectedfrom the pawl due to the travel 'of the valve stern during the openingmovement zof the valve.

" 22. Thev combination With a rotary drum` lof ra valve for control-lingthe supply or' steam to said drum, the said valve having a stem mountedto rotate and provided With a threaded portion,'a nut engaging thethreaded portion of the stem and vjournaled to prevent travellongitudinally on the stem, an operative connection between the nut anddru-m for imparting a step-by-step movement tothe nut `in synchronismWith the rotations of the drum, a Wheel fast on the valve stem andhaving a toothed face, a spring-actuated pawlengaging the toothed faceof the Wheel to lock the valve stem against travel in one direction, andan operative connection ybetween thepavvl and the steam pressure in thedrum for automatically disconnecting the pavvl from 'the `toothed Wheelwhen the drum is under normal steam pressure. v

23. The combination With a rotary drum, of a valve for controlling thesupply ot steam to said drum, the said valve having a stem mounted torotate and provided with a threaded portion, a nut engaging the threadedportion of the stem and journaled to prevent travel longitudinally onthe stem, an operative connection betvveen ythe nut and drum forimparting a step-by-step movement to Ythe nut in synchronism With therotations of the drum, a Wheel fast on the valve stem and having arecessed peripheral face, a spring-actuated stop engaging the recessesin the said `wheel for locking the stem against rotation, and means formanually disconnecting the said stop from the recessed face of theWheel. f

24. The combination With a rotary drum, of a valve for controlling thesupply of fluid thereto, said valve having a rotary stem, means forlocking the stem 'against rotary movement in a direction toopen thevalve,

a nu't in Which the valve stem is threaded, the nut being journaled toprevent travel in the direction of the aXis of the stem, an operativeconnection between the nut and the drum, whereby as the latter isrotated the nut Will be actuated to move the valve and its stem in thevalve-opening direction, and frictional retarding means in the operativeconnection between the nut and the drum.

25. In valve mechanism for controlling the passage of fluid to rotaryreceptacles, Vthe combination of a valve piece having a rotary stemprovided With a threaded portion, a nut having threads cooperating withthe threads of the said stem, the nut being ournaled to prevent travellongitudinally of the stem, means for intermittently locking the stemagainst rotation in one direction, and an operative connection betweenthe rotary receptacle and the nut for rotating the latter in theopposite direction.

2G. In valve mechanism for controlling the passage of fluid, thecombination of a valve piece having a rotary stem provided With athreaded portion, a nut having threads cooperating with the threads ofthe said stem, the nut being journaled to prevent longitudinal travel onthe stem, and means for locking the stem against rotation in onedirection.

27. In valve mechanism for controlling the passage of fluid, thecombination of a. valve piece having a rotary stem provided with athreaded portion, a nut having threads cooperating With the threads ofsaid stem, the nut being journaled to prevent longitudinal travel on thestem, means for locking the stem against rotation in one direction, andmeans for rotating the nut in the opposite direction.

28. In valve mechanism the combination of a valve piece provided With arotary stem having a threaded portion, a nut threaded to coperate withthe threaded portion of the stem, and ournaled to prevent longitudinaltravel on the stem, means to prevent rotation of the stem in onedirection, and means for rotating the nut in the opposite direction tomove the valve and its stem in the direction of the latters axis.

29. The combination of a valve having a rotary stem, means for lockingthe stem against rotary movement in a direction to open the valve, a nutin which the valve stem is threaded, the nut being journaled to preventits travel in the direction of the axis ot the stem, and means forrotating the nut to move the valve and its stem in the valve openingdirection.

30. 1n valve mechanism the combination of a valve for controlling thepassage of steam, the valve having a. stem mounted to rotate, andprovided with a threaded p0rtion, a nut Which the threaded portion ofthe stem engages, the nut being journaled to prevent travel in thedirection of the axis of the stem, and means for preventing the stemWhen the valve is closed from rotating in a direction to turn on thesteam.

3l. The combination of a valve for controlling the passage of Huid, thevalve having a stem mounted to rotate and provided with a threadedportion, a nut Which the threaded portion of the stem engages, the nutbeing journaled to prevent travel in the direction of the axis of thestem, means for preventing the stem when the valve is closed fromrotating in a direction to turn on the fluid, and means for imparting astep by step rotary movement to the nut.

32. The combination of a valve for controlling' the passage of fluid,the valve having a stem mounted to rotate and provided With a threadedportion, a nut which the threaded portion of the stem engages, the nutbeing journaled to prevent travel in the direction of the axis of thestem, means for preventing the stem When the valve is closed fromrotating in a direction to turn on the fluid, means for imparting a stepby step rotary movement to the nut, and means for automaticallyreleasing the means for locking the valve stem against rotation.

33. 1n combination a valve provided With a stem having a threadedportion, a nut which the threaded portion of the stem engages, the nutbeing journaled to prevent longitudinal travel on the stem, a toothedWheel fast on the stem, a paWl mounted to engage the teeth of said Wheeland lock the stem against rotation in the direction to open the valvewhen the latter is closed, the pawl being fulcrumed intermediate itsextremities, a stem having one end connected With the arm of the pawl onthe opposite side of the fulcrum from the extremity Which engages thetoothed Wheel, and a Spring acting on said stem to hold the paWlyieldingly in engagement with the teeth of the said Wheel.

34. In combination a. valve for regulating the passage of fluid, thevalve being provided With a stem having a threaded portion, a nut Whichthe threaded portion of the stem engages the nut being journaled toprevent longitudinal travel on the stem, a toothed Wheel fast on thestem, a spring actuated paWl mounted to engage the teeth of Said Wheelto lock the stem against rotation in the direction to open the valve,and a flexible diaphragm operably connected With the paivl on one sideand with the Huid pressure on the opposite side to automaticallydisconnect the paivl from the toothed face of the Wheel when the fluidpressure is normal.

35. The combination of a valve for regulating the passage of fluid, thevalve being provided with a stem having a threaded por? tion, a nutwhich the threaded portion of the stem engages the nut being journaledto prevent its travel longitudinally on the stem, a Wheel fast on thestem and having a series of recesses in its peripheral face, a springactuated stop arranged to engage said recesses to lock the stem againstrotary travel, and means for disconnecting the said stop from saidWheel.

36. The combination of a valve for regnlating the passage of fluid, thevalve being provided with a stem having a threaded portion, a nut whichthe threaded portion of thefstem engages, the nut being journaled toprevent its travel longitudinally on the stem, a wheel fast on the stemand havingva series of recesses in its peripheral face, aspring-actuated stop arranged to engage said recesses to lock the stemagainst rotary travel, and manually operable means for disconnecting thesaid stop from said wheel.,

37. In combination, va valve for controlling the passage offluid thesaid valve hav mg a stem mounted to rotate and provided with a threadedportion, a nut engaging the threaded portion of' the Ystem and journaledto prevent its travel-longitudinally on the stem, a spring-actuated pawlengaging the toothed face of thel wheel to lock the valve stem againsttravel in one direction, and an operative connection between the pawland n the fluid pressure for automatically disconnecting the pawl fromthe toothed wheel when the fluid pressure is normal.

88. In combination, a valve having a stem mounted to rotate and providedwith a threaded portion, a nut engaging the threaded portion of thestem` and journaled to prevent travel longitudinally on the stem, awheel fast on the valve stem and lhaving a recessed peripheral face, aspring actuated stop engaging the recesses'in the said wheel for lockingthe stem against rotation, and means for manually disconnecting the saidstop from the recessed face of the wheel.

39. In combination, a. valve piece having a rotary stem provided withathreaded portion, a nut having` threads cooperating with the threads ofsaid stem, the nut being journaled to prevent longitudinal travel onAthe stem, and means for intermittently locking the stem against rotationin one direction. I

40. The combination witha rotary receptacle, of avalve mountedindependently of the receptacle for controlling the supply of fluidthereto, and an operative speed reducing connection between the valveand said receptacle for imparting movement to the valve.

41. The .combination with a rotary receptacle oi a valve mountedindependently of the receptacle for controlling the supply of fluidthereto, and an operative speed reducing connection between the valveand said receptacle Jfor imparting the opening movement to the valve.

42. The combination with a rotary receptacle, of a valve for controllingthe supply Y of iiuid thereto, and an operative speed reducingconnection ybetween the valve and said receptacle for imparting a stepby step movement to the valve as the receptacle rotates.

43. The combination kwith a rotary receptacle, of a valve mountedindependently of the receptacle for `controlling the supply of :tluidthereto, operating means arranged be- `means to'cause the saidreceptacle to actu:

ate said means to impart lmovement to the valve during the rotationofthe receptacle.

45. The'combination with a rotary recep- 'tacle, of a valve forcontrolling the passage of fluid thereto, speed reducing means arrangedbetween the valve and the rotary receptacle to cause the receptacle toimpart movement to the valve as the receptacle rotates, and means forautomatically breaking the connection between the valve and the rotaryreceptacle. v

46. In combination, a valve for controlling the passage of fluid torotary receptacles, speed reducing means for opening said'valve bytherotary movement of a receptacle yof said character, means for retardingthe opening movement of the valve, and means for manually closing saidvalve.

47. In combination, a rotary receptacle, a valve for controlling thepassage of fluid thereto, means for manually operating the valve, andaspeed reducing connection between said last named means and the rotaryreceptacle to operate the valve as the receptacle rotates.

48. In combination, a rotary receptacle, a

lvalve for controlling the passage of fluid thereto, means for manuallyoperating the valve and speed reducing means for operating italsothrough the medium of the said receptacle as the latterrotates.

' 49. In combination, a rotary receptacle, a

valve for controlling the passage of fluid` thereto, means for manually'operating the valve, and an operative speed reducing connection betweenthefsaid valve and the rotary receptacle.

50. In combination, `a rotary receptacle, a

valve for controlling the passage of fluid thereto, means for manuallyoperating the valve, means for locking said operating means againstmovement to open the valve,

and means actuated .b y the iiuid pressure in the receptacle forreleasing said locking means. p

51. In combination, a rotary receptacle, a valve for controlling thepassage of fluid thereto, means for manually operating the valve, meansfor locking said operating means to prevent the opening movement of thevalve, and means, including a. flexible diaphragm acted on by the fluidpressure 1n the receptacle for releasing said locking device.

52. In combination, a rotary receptacle, a valve for controlling thepassage of fluid to the receptacle, means for manually operating thevalve, means for locking said operating means to prevent the openingmovement of the valve, a connection between the valve and rotaryreceptacle to operate the valve as the receptacle rotates, and meansactuated by the fluid pressure in the receptacle to release the saidlocking means.

53. In combination, a rotary receptacle, a valve forcontrolling thepassage of fluid to the receptacle, means for manually operating thevalve, means for locking said operating means to prevent the openingmovement of the valve, a connection between the valve and the rotaryreceptacle to operate the valve as the receptacle rotates, and means,including a diaphragm, acted on by a predetermined fluid pressure in thereceptacle for releasing said locking means.

54, Valve mechanism for controlling the passage of :Huid pressure torotary receptacles, comprising a valve, means to open the same by therotary movement of said receptacle, and means to open and close saidvalve manually, the manually operating means befluid pressure passedthrough the said valve to release said locking` device.

56. In valve mechanism for controlling the passage of' fluid, thecombination of a valve piece having a rotary stem provided With athreaded portion, a nut having threads coperating with the threads ofsaid stem, the nut being mounted to prevent longitudinal travel on thestem, means for locking the stem against rotation in one direction, andfluid pressure controlled means for releasing the lockingmeans.

In testimony whereof I aflix my signature, in presence of two witnesses.

MARTIN Il. COLLO litnesses GRACE I-IUs'roN, A. J. OBRmN.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

